Plowshare.



No. 780,634. PATENTED JAN. 24, 1905. W. T. M. BRUNN'EMER. PLOWSHARE.

APPLICATION FILED 11113.21, 1904- i I f UNITED STATES Patented January 24:, 1905.

I WILLIAM T. M. BRUNNEMER, OF MONMOUTH, ILLINOIS.

PLOWSHARE.

SPECIFICATION forming part of Letters Patent No. 780,634, dated January 24, 1905.

Application filed March 21, 1904. Serial No. 199,155.

To all whom it may concern.-

Be it known that 1, WILLIAM T. M. BRUN- NEMER, a citizen of the United States, residing at Monmouth, in the county of Warren and State of Illinois, have invented certain new and useful Improvements in Plowshares, of

which the following is a specification, reference being had to the accompanying drawings. v My invention relates to plowshares, and has for its object to provide a new and improved share in which the point will be composed of high-carbon steel, the body of the shareof soft-center steel, and the landside of iron. The advantages of .-so constructing .the share are that the high-carbon steel point takes the requisite tempeiy while the soft-center body of the share secures greater strength with less liability to break, and the iron landside not only is tougher and resists fracture, but also wears away on the under side next to the' point, so that the proper suction is maintained. Where the landside is of harder material which holds its shape, the. point wears away faster than the landside, and consequently the effect isto cause the plow to have a tendency to run out of the ground.

, Heretofore many attempts have been made to produce a plowshare having the construction above described, but, so far as I am aware,

none of them have been successful. I have, however, discovered a method of constructing such shares by which very satisfactory results are secured, the share produced having the requisite thickness of hardened-steel point, united with the soft-center body portion of the share and with the iron landside immediately back of and running into the point.

My improved process consists in welding a shin-piece of high-carbon steel tov the softcenter body of the share in the proper place to form the point, the iron landside being welded to the share in the proper position, but in such manner that the point of the share extends down beyond the lower edge of the landside, completely finishing the top of the share-point without reducing the thickness of the material on the point. That portion of the point which projects down below the bottom of the landside is then cut or ground 01f flush with the lower surface of the landside,

completing the share. In practice the softcenter body of the share also is extended down below the lower edge of the landside,

the shin-piece being first welded to the body lower edge of the landside, so that in the completed share there is first a high-carbon steel point which, measured on a line with the bottom of the landside, is somewhat thicker than the perpendicular thickness of the shinpiece, then the main body of the share of softcenter steel, the thickness of which is also somewhat greater than the perpendicular thickness of the share, and, finally, the iron landside. The landside is therefore protected by the full thickness of the point and of the soft-center steel body of the share.

In the accompanying drawings I have illustrated my improved share as well as the method of making the same. Figure 1 being an end elevation of the share; Fig. 2, a partial plan view; Fig. 3, a partial rear view, and

Fig. 4: a section on line 4 4 of Fig. 1.

As shown in the drawings, a represents the landside, Z) the soft-center body, of the share, and c the high-carbon steel point. As indicated by dotted lines in Fig. 2, the high-car bon steel shin-piece which forms the point 0 is preferably placed only at the lower forward portion of the share; but it may be extended over a greater part of the surface of the share,

if desired. In the process of manufacture, as shown by dotted lines in Fig. 1, the shin-piece is provided with a portion 0', which extends below the lower edge of the landside, and in like manner the body of the share is also extended below the landside, as shown at b. When the parts are welded together, the downwardly-projecting portions 6 c are cut or ground off flush with the lower edge ofv the landside, thereby completing the top of the share without reducing. the thickness of the steel previously added. The lower surface of the point and also the lower surface of the share thus form substantially a continuation of the lower surface ofthe landside.

I am aware that heretofore it has been attempted to provide an iron landside with a high-carbon steel point by welding a piece of high-carbon steel upon the body of the share over the front portion of the landside, the point being afterward formed by forging under a hammer; but according to this process the iron of the landside is drawn out over the point and the thickness of the shin-piece fre-' quently reduced so much as to expose the softcenter body of the share, thereby defeating the object sought. I am aware also that it has been attempted to extend the soft-center steel body of the share beyond the point of the landside, the extended portion being then doubled back under the landside and welded thereto, the point being formed by forging and grinding; but the result of this method frequently is that the soft-center steel of the point is ground through before the proper shape is secured, and besides by this construction for several inches both on the top and bottom the point of the share is of steel, which takes temper and breaks very easily, so that a share so constructed is ineflicient and unsatisfactory.

The objections to the prior construction above described are wholly avoided by my invention, besides securing the advantages hereinbefore mentioned.

My invention, so far as I am aware, is ge ne'ric in character and the claims should be construed accordingly.

That which I claim as my invention, and desire to secure by Letters Patent, is-

1. A plowshare, consisting of an iron landside having a hard-steel point projecting beyond the landside, the lower surface of the point being substantially flush with the-lower surface of the landside, substantially as described. g

2. A plowshare, comprising an iron landside, a soft-center steel share welded thereto, and a hard-steel shin-piece weld ed to the share and forming the point thereof, thelower surfaces of the share and shin-piece at the point being substantially flush with the lower surface of the landside and forming a continuation thereof, substantially as described.

3. A plowshare, consisting of an iron landside having a hard-steel point, the top surface of the point finished without materially reducing the thickness, the lower surface of the point being flush with and a continuation of the lower surface of the landside, substantially as described.

4. A plowshare, composed of an iron landside and a steel point welded together, the point being extended down to the lower edge of the landside and projecting beyond the landside, substantially as described.

5. A plowshare, composed of an iron landside, a soft-center steel share, and a hard-steel point, the point being extended to the lower edge of the landside, substantially as described.

6. A plowshare, composed of an iron landside and a steel point welded together, the point being extended down to the lower edge of the landside without substantial reduction in thickness, substantially as described.

7 A plowshare, composed of an iron landside, a soft-center steel share, and a hardsteel point, the point being extended to the lower edge of the landside without substantial reduction in thickness, substantially as described.

8. A plowshare, composed of an iron landside, a soft-center steel share, and a hardsteel point, the point and share being extended to the lower edge of the landside, substantially as described.

9. A plowshare, composed of an iron landside, a soft-center steel share, and a hardsteel point, the point and share being extended to the lower edge of the landside without substantial reduction in thickness, substantially as described.

10. A plowshare, composed of high-carbon steel welded on the point of a soft-center share, and an iron landside, the thickness of steel being preserved and the steel supported with iron near the point, substantially as described.

WILLIAM T. M. BRUNNEllllllt.

Witnesses:

O. SoDnNBURe, W. C. ABBOTT. 

